Working Seiko Matic 15031D AT Automatic 20 Jewels Silver Dial Description Up for auction is a classic and highly collectible Seiko Seikomatic (Ref. 15031D) featuring a clean silver sunburst dial and a robust 20-jewel Diashock automatic movement. Known for their reliability and timeless mid-century dress watch proportions, vintage Seikomatics represent an essential cornerstone for Japanese domestic market (JDM) collectors. The watch measures 36 mm across without the crown and 40 mm including the crown, offering a classic presence on the wrist. Paired with a versatile black leather strap, this piece is ready to wear or add to a growing vintage collection Specifications Brand: Seiko Model: Seikomatic Reference Number: 15031D Movement: Automatic (AT), 20 Jewels (Diashock) Dial: Silver sunburst dial with gold-tone applied baton indices and hands Case Material: Gold-plated case Case Dimensions: 36 mm without the crown / 40 mm with the crown Crystal: Acrylic crystal Strap: Aftermarket black leather strap with a gold-tone pin buckle Functionality: Timekeeping and automatic winding mechanism are in working order Condition Report Dial: Original silver sunburst dial showing graceful, authentic age-related patina and minor signs of character consistent with a vintage timepiece from this era. Case: Gold-plated case shows signs of wear, surface hairline scratches, and localized plating wear consistent with age and vintage use. Crystal: Acrylic crystal presents light surface scratches that can be polished or left as-is to preserve its original vintage profile. Movement: The 20-jewel automatic movement is running and functional. Note: As this is a vintage timepiece, service history is unknown, and a professional service or timing adjustment may be recommended for optimal daily accuracy. Strap: Fitted with a new aftermarket black leather strap in clean, unworn condition. Please review all high-resolution photos carefully to assess the exact physical condition of the watch.